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- Sat May 20, 2017 8:57 am
- Forum: Problems (E53 1st-gen, 2000-2006)
- Topic: Engine light on with P0171 OBD-II Trouble Code: System Too Lean (Bank 1)
- Replies: 4
- Views: 1034
Engine light on with P0171 OBD-II Trouble Code: System Too Lean (Bank 1)
My dad had his X5 serviced the other day and the engine light has now appeared. I ran a diagnostic test on it and the results came back with P0171 OBD-II Trouble Code: System Too Lean (Bank 1). This happened last time on the previous service but went away after time he informed me. Is this a common ...